Feed mechanism for saw-mill carriages



(No Model.)

G. E. CLARK.

FEED MECHANISM FOR SAW MILL GARRIAGES. N0. 351,165

Patented Oct. 19, 1886.

Attorney 4 sheaves D at each end of the carriage-way,

UNrrn STATES CHARLES E. CLARK, OF BELMONT, NE? YORK.

FEED MECHANISM FOR SAW-MILL CARRIAGES.

SPECIFEQATIQN forming part of Letters Patent No. 351,165, dated October 19,1886.

Application filed August 31, 1885.

To all whom it may concern.-

Be it known that I, GHiRLEs E. CLARK, a citizen of the United States, residing at Belmont, in the county of Allegany and State of New York, have invented certain new and useful Improvements in SaW-Mill-Carriage Feeds, of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure 1 is a side view of my steam-feed; Fig. 2, a detail of the drum, racks, &c. Fig. 3 is a modification.

This invention relates to certain new and useful improvements in that class ofsaw-mill feeds which are operated by an independent steameylindcr and connections; and the invention consists in the peculiar combinations and the construction and arrangement of parts,herei nafter more particularly described and claimed.

Referring now to the details of the drawings by letter, A represents the carriage-way; B, the carriage running thereon,provided with the usual rollers or wheels, I), and having eonneeted to it a wire rope, C, which passes over and has its ends rolled around and connected to the drum. E, although it may, if preferred, have its ends connected to the carriage audits center coiled around the drum a su fticient nu mber of times to hold fast thereto by friction.

F is a steanrcylindcr provided with a piston (shown in dotted lines) and a pistonrod, G, carrying a yoke, H, in which runs a short shaft, 1, on which is securely fastened the drum E, and two pinions, J, which mesh into racks K, firmly fastened to an extension of the cylinder-bed L.

AtM is a lever, pivoted at m to the carriageway or to some other convenient fixed part of the frame, and connected with a beltcrank lever, N, by a rod, 0, pivoted to both levers. The lever N is connected with the stem 1 of the valve Q, which has pipes E leading to the opposite end of the cylinder. The lower end of the lever has a strap, S, which carries a weight, T, which strap passes between two pulleys, U, so that any motion of the lever from the position shown will raise the weight, and the latter will consequently tend to always keep the lever in its present or normal position in which the steam is shut off, and the piston consequently remains stationary. This ar- Scriarl No. 175,770. (No model.)

rangement of the lever, weight, valve, 850., is well known, and it is therefore unnecessary to further describe it.

It will be observed that the sheaves D are so arranged relative to the drum as to guide the'rope C over the drum in such a manner as to cause said rope O to press on the drum E, and thus cause the pinions to always remain in their proper position upon the rack. XVith out this arrangement of the sheaves, rope, &c., there would have to be guides to keep the pinions from rising out of the rack and the expense and friction due to the making and use of such guides is thus dispensed with.

The operation of the apparatus can be readily seen, and it seems unnecessary to describe it at length. It is sufficient to state that with the lever in its present position steam is shut off from the cylinder and the carriage is at rest; but if the lever M is moved steam is admitted to one end of the cylinder or the other, according to the direction theleveris moved, which steam operates the piston and moves the yoke II, which drives the pinions over the racks and causes the drum. to turn, thus winding up one end of the rope and unwinding the other, thereby giving motion to the carriage.

Instead of the racks and pinions a drum, 6, on each end of the main drumshaft, may be used, as shown in Fig. 3, and ropes a wound around these drums with their ends attached to studs Z on the bed L. From this it will be seen that modifications may-bemade in the details of construction without departing from the spirit of my invention.

I am aware of the Patent No. 176,409, in which a vibrating toothed segment is used to operate a pinion and drum and revolve the same in opposite directions, and therefore make no claim, broadly, to the use of a pinion and drum and mechanism for operating the same in opposite directions. My arrangement, however, diffcrs essentially from this in that the cylinder and drum are arranged nearly or substantially in the same horizontal plane, and the straight rack which I employ in lieu of the segment takes up little or no additional space and is much stronger. The apparatus is thus rendered much more compact, whereby space is economized, and as the action between the piston and drum is substantially in a direct line, and as the rack is stronger than the ICO toothed segment, the mechanism may be much lighter and there is less danger of breaking.

What I claim as new is 1. The combination of a saw-mill carriage, a frame supporting the same, a guide-sheave near each end of said frame, a drum reciprocating and revolving in opposite directions alternately, and a rope connected with the car riage and passing around the sheaves to the drum, with a cylinder, a piston and its rod working therein, and a straight rack, all arranged in substantially the same horizontal plane "as the drum, and a pinion fast on the drum-shaft, meshing with the rack and revolving in opposite directions, and of smaller diameter than said drum, and arranged to cause the drum to wind the rope upon itselfin opposite directions alternately, substantially as de scribed.

2. The combination ofa saw-mill carriage, of a'cylinder and piston, a pinion and a drum rigidlyconnected with each other and having the shaft on which they turn reciprocated in opposite directions by the motion of the piston, a rack into which said pinion meshes, and a rope wound in opposite directions alternately around said'drum and connected to the carriage, substantially as described.

3. The combination, with a saw-millcarriage, of a cylinder, a piston and rod working therein, a yoke connected to the pistonrod, a drum rigidly attached to a shaft work-' ing in said yoke, two pinionsfixedly mounted on the shaft of said drum, two racks arranged on opposite sides of the drum and meshing with said .pinions, and a rope wound in opposite directions alternately around said drum and connected to the carriage, all substantially as described.

4. In a'rope feed saw-mill, the combination of a drum, a rack, and a pinion, with the guide for the rope arranged to hold said rope CHARLES CLARK.

Witnesses:

J. H. BRa soN, J. N. HYDE. v 

